Whats the point of a bigger HDD if you cant use it?

[JOhnyBravoos]

Well it doesn't "reserve", well maybe it does but what I'm trying to explain is the 1000 vs 1024 bits battle.

So your 120GB HDD is more like 112GiB(This is before inserting it to your Xbox where it does(n't) reserve some of the HDD)